Giant TCX1: Cable to hydraulic. How difficult?

Well, seen as there’s a ‘cheap’ (it’s all comparative) set of RS685’s on the go has anybody converted their TCX from Spyres to hydraulic?

What’s involved? How difficult is it?

Do you need new rotors and calliper adapters? Can’t seem to find either on Merlin, CRC or Wiggle.

If I go for it I’d also want wider bars, as wide as possible (46’s preferably). Anybody got any cheapish recommendations for these (or ‘wide’ 44’s)?